<template>
  <div class="Roles">
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 == 0 ? 'bdtop' : '', 'vcenter']"
              :key="item1.id"
              v-for="(item1, i1) in scope.row.children"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[i2 == 0 ? '' : 'bdtop', 'vcenter']"
                  :key="item2.id"
                  v-for="(item2, i2) in item1.children"
                >
                  <!-- 通过for循环 嵌套渲染二级权限 -->
                  <el-col :span="6">
                    <el-tag
                      closable
                      type="success"
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      @close="removeRightById(scope.row, item3.id)"
                      closable
                      type="warning"
                      :key="item3.id"
                      v-for="item3 in item2.children"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>

        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              @click="showsSetRght(scope.row)"
              size="mini"
              type="warning"
              icon="el-icon-setting"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="showsSetRghtDialogVisible"
      width="50%"
      @close="SetRghtDialogClose"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightlist"
        :props="treeProps"
        show-checkbox
        default-expand-all
        node-key="id"
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="showsSetRghtDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      //控制分配权限对话框的显示与隐藏
      showsSetRghtDialogVisible: false,
      //所有权限的数据
      rightlist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      //默认选中的节点id值数组
      defKeys: [],
      //当前即将分配角色的id
      roleId: '',
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
      // console.log(this.rolelist);
    },
    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) return this.$message.error("删除权限失败");
      // this.getRolesList();
      role.children = res.data;
    },
    //展示分配权限的对话框
    async showsSetRght(role) {
      this.roleId = role.id;

      console.log(this.roleId);
      //获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");

      if (res.meta.status !== 200)
        return this.$message.error("获取权限数据失败");
      //把获取到的数据保存到 data中
      this.rightlist = res.data;

      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys);
      this.showsSetRghtDialogVisible = true;
      // console.log(this.rightlist);
    },
    //通过递归的形式获取角色下所有三级权限的id 并保存到 defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }

      node.children.forEach(item => this.getLeafKeys(item, arr));
    },
    //监听分配权限对话框的关闭事件
    SetRghtDialogClose() {
      this.defKeys = [];
    },
    //点击位角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      const idStr = keys.join(",");
      const { data: res } =await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr});
      // console.log(res);
      if (res.meta.status !== 200) return this.$message.error("分配权限失败!");
      this.$message.success("分配权限成功");
      this.getRolesList();
      this.showsSetRghtDialogVisible =false
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
